The Mundane World Hypothesis (mwh) says that we have material bodies, we have brains located inside our bodies, we have sense organs which process visual information, the direct cause of our perceptual judgments is typically macroscopic material objects, and we live in a material world. Skeptics using underdetermination arguments arguemwhhas no more epistemic merit than some skeptical competitor, e.g., that we are in the Matrix. Since such competitor hypotheses are equipollent, we are not justified in believingmwh. This paper takes the (...) underdetermination skeptic’s premises to a more radical conclusion: skeptical dogmatism, which is the view thatmwhis probably false based on the idea that there are many equipollent competitors tomwh. (shrink)